PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-18866Adapter,straight,tube to Boss

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4730-01-509-2187 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-509-2187 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-509-2187. Primary manufacturer part number: MIL-DTL-18866.
Features
  • Adapter,straight,tube to Boss — FSC 4730
  • 2 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-01-509-2187, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-509-2187
Primary Part NumberMIL-DTL-18866
Item NameAdapter,straight,tube to Boss
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4730-00-226-6770 INTERCHANGEABLE
Adapter,straight,tube to Boss
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-18866 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS51520B4S Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4730-00-226-6770INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO BOSS

Frequently Asked Questions

What is NSN 4730-01-509-2187?

NSN 4730-01-509-2187 is a Adapter,straight,tube to Boss, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-509-2187?

NSN 4730-01-509-2187 has 2 cross-referenced part numbers: MIL-DTL-18866 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS51520B4S (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4730-01-509-2187?

There is 1 known substitute for 4730-01-509-2187: 4730-00-226-6770. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-18866?

Key specifications for MIL-DTL-18866: Part Name Assigned by Controlling Agency: ADAPTER, STRAIGHT, TUBE TO BOSS. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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